<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>{% block title %}父模板{% endblock title %}</title></head><body><h1>网页头部状态栏</h1><br><br><br>{% block bodycotent %}    <h1>网页中间内容</h1>{% endblock bodycotent %}<br><br><br><h1>网页底部内容</h1></body></html>